Lubricator



P. AND C. R. BOSCH.

LUBRICATOR.

APPLICAHON HLLD N0v.14.19ls.

-Patfented Milf. .2, 1920.

IES...

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Immun; Hllllll PETER DOSCH AND CHARLES R. DOSCH, 0F STRATFORD, CONNECTICUT.

LUBRICATOR.

Speciication of Letters Patent.

Patented Mar. 2, 1920.

Application led November 14, 1918. Serial 310.2623147.

To all whom t may concern:

Be it known that we, PETER DosoH and CHARLES R. DosoH, both citizens of the United States, residing at the town of Strat# ford, county of Fairiield, and State of Connecticut, have invented certain new and useful Improvements in Lubricators; and we do declare the following to be a full, clear, and exact description of the'invention, such as will enable others skilled in the art to which it appertains t-o make and use the same. Y

This invention relates to certain new and useful improvements in lubricators, and especially to a force feed type of lubricator for supplying lubricant to a multiplicity of bearings.

The primary object is to provide an efli cient lubricator having a valved piston orplunger for controlling the intake and expulsion of the\lubricant from its cylinder, and it consists primarily of a cylinder having plural discharge orifices at one end and a reservoir at the opposite end, a hollow plunger operable in the cylinder and provided with a lubricant passage in its head which is adapted to be closed by an actuating means for the plunger on the expressing stroke and to be opened on the return stroke.

The invention further resides in the features of construction and the association'of parts hereinafter described in detail and claimed succinctly, the preferred embodiment being exempliied in the accompanying drawing wherein:

Figure 1, is a top, plan view of the improved lubricatorj and Fig. 2, is a vertical section therethrough with the parts partly in elevation.

Further describing the invention, the con' struction illustrated embodies a reservoir 1, from which depends the cylinder 2, being in vthe present instance, integrally formed therewith and located at one end thereof. The lower end of the cylinder-fis. closed by a head 3, having a plural number of discharge orifices into lwhich the delivery pipes or tubes 4, are threaded.

Reciprocal vertically within the cylinder 2, is a downwardly vfacing plunger 5 having a long skirt portion and arranged diametrically in the', upper opened en d of the skirt portion is' a vertical bail or plate like support 6, formed with a horizontal slot 7, within which latter isa'circular cam 8 fixed on a transverseA shaft 9, the shaft being journaled in the side walls of the reservoir above the cylinder. One end of the shaft 1s extended and shaped to receive a handla 10 by which the cam may be rocked for vertically reciprocating the plunger.`

The head of the plunger is provided with an oil passa e or port 11 that extends through a pac ring ring 12, and a clamping ring or plate 13 serves to hold the packing 1n place for which purpose screws 14. are employed. Within the plunger is a diametrical guide bracket 15, having a vertical guide opening through which slides the vertical stem 16 of a valve 17, said stem extending through the lubricant passage 11, and carrying the valve on its lower end. The opening in the clamping ring is 'sulficiently large to receive the valve to permit the same engaging on its seat 18 provided by the exposed portion of the acking ring.

Fixed on the transverse sliaft 9 adjacent to the cam 8, is a second cam 19, of semicircular form, which cam 19 is concentrically disposed relative to the shaft and adapted to ride on the upper end of the valve stem. A coil spring 20 encircles the stem and seats at its lower end on the guide bracket or cross-bar 15, While its upper end is connected to the stem through the intermediary of the bearing ring 21, and cotter pin 22.

"In operation, the cover plate 28 is first removed and the reservoir filled with lubricant, whereupon the handle l0 is rotated from' a vertical position, in which 'the oil passage through the plunger is closed by the valve, to the position in which the valve is open, as shown in Fig. 2. This movement will cause the plunger and its valve to move in unison a short vertical distance when the valve stem will abut the concentric edge of the half cam 19, which stops the upward travel of the valve while the eccentric cam 8 has sliding contact on the upper and lower sides of the slot 7 and. continues to pull the lunger upwardly away from the valve. 'lphis relative movement affords an increased area for the flow of vthe lubricant through the plunger passage 11. Upon reverse movement of the handle the plunger is given an linitial downward movement before the valve en ages its seat. VContinued manipulation o the handle in the reverse direction causes the plunger and valve to move together and consequently lto express and expel the `valve stem has reached the end of the con-v centric cam edge., whereby when the stem is caused to rengage the latter, on upward movement of the plunger, the shoulder tern minal of said edge will have passed and therefore the. return operation of the stem will be free and unliindered. The valve is not greater in thickness than the clamping 'ring so that full movement of the plunger down onto the oi-ili-ced head is unobstructed. The quantity .of lubricant supplied the bearings may be varied by adjusting the concentric cam 19 relative to cam 8, for such adjustment will vary the time of opening and closing of the valve.

lWhat is claimed is l. In a force feed lubricator an oil reservoir, a cylinder 'communicating at one end with the reservoir and having a plurality' of discharge orifices in its opposite end, oil delivery tubes connecting' with the orifices respectively and each extending to a part to be lubricated, a hollow plunger within the cylinder having an oil passage in its lower end, a valve controlling said passage provided with an upwardly extending stem, a cam shaft, a cam thereon for operating the plunger, and means upon the shaft engaging with the stein for actuating the said valve at predetermined times ,during the rotation of the shaft.

:2. A self-contained lubricatoi embodying an oil reservoir, a cylinder rigidly attached tothe reservoir and communicating at one end with it and having a plurality of discharge orifices in its opposite end, each adapted te receive` an oil delivery tube. a hollow plunger within the cylinder having ancil passage in its lower end, a valve controlling said passage provided with an upwardly extending stein, a cam shaft, jour- Analed on said reservoir, a cam thereon for operating the plunger, means upon the shaft engaging with said stein for actuating said valve at predetermined times during the rol tation of the shaft, and means upon the exoil passage and said clamping member having an opening of larger diameter than the oil passage whereby to expose a portion of the packing to function as a valve seat, and

a valve engageable with the seat.

4. In a force feed lubricator, a cylinder having one end communicating with a lubricant reservoir and its opposite end closed by a head having discharge orifices, a plunger operable in the cylinder, a packing member, a clamping member securing the packing on the plunger head, said packing and plunger being formed with an oil passage and said clan'iping member having an opening of larger diameter than the oil passage whereby to expose a portion of the packing to function as a valve seat, a valve engaging the seat, and means for siinultaneously operating the plunger and valve.

5. In a force feed lubricator, a reservoir, a cylinder communicating therewith at one end and having its opposite end formed with discharge orifices, a plunger operable in the cylinder and formed with an oil pas sage, a valve controlling said passage and having a stem extending upwardly there.

through, a bail extending upwardly from the plunger, acam shaft carrying a cam cooperable with the bail to actuate the plunger, and a' second cam engageable with the valve stein for controlling the opening of the valve.

In testimony whereof we affix our signatures in presence of two witnesses.

PETER DOSCH. CEAS. R. BOSCH.

lll/Titnesses R. fi.. Runas, Hkiiivsoiv M. BizooKs. 

